Small Engines (Lawn Mowers, etc.)/RIDING MOWER VIBRATION

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Question
QUESTION: HELLO MR. JONES I HAVE A 2005 YEAR MODEL HUSQVARNA RIDING MOWER, ENGINE SOUNDS GREAT, PROBLEM WHEN I ENGAGE THE CUTTING BLADES THERE IS A NOISY VIBRATION, AND WHEN I AM CUTTING IT SLOWS THE ENGINE DOWN BY ABOUT 50%. IT ONLY MAKES THE NOISE WHEN YOU ENGAGE THE BLADES.  HUSQVARNA GT 2254 96023000500. ENGINE MODEL 40H777 TYPE 0241-E1 CODE 050208YH.  IT IS A 54 INCH CUTTING WIDTH. IS THERE A CLUTCH OR A BEARING GOING OUT YOU THINK? I WOULD APPRECIATE ANY IDEAS TO CHECK OUT. THANK YOU SIR.

ANSWER: I would suspect a bearing is going bad or some part on the deck is broke.  I would start by removing the cutting deck and checking the parts by looking at them and rotating any moving parts by hand to see if you see or feel any wore or broke (too tight) parts.

Does your owner's manual tell you how to remove the deck?

Eric

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QUESTION: I DID REMOVE THE DECK, THE SPINDLE BEARINGS AND PULLEYS ALL TURN VERY EASY NO BROKEN OR BENT PARTS THAT I CAN SEE. THE BELT IS IN GOOD CONDITION. WHEN I PUT THE DECK BACK ON ITS THE SAME. WHEN I ENGAGE THE CUTTING BLADES, THE ENGINE GOES FROM A HIGH RPM TO ALMOST AN IDLE SPEED ALMOST KILLING THE ENGINE. WHAT ENGAGES THE BLADES ON THIS MODEL? THERE ARE NO CABLES ON THIS MODEL.

Answer
You have an electric PTO clutch.  When you turn the switch electric current energizes the clutch which then turns the belt.

The clutch could be bad, you could just have an electrical issue or both.

You Tube showing an electric PTO clutch:

https://www.youtube.com/watch?v=aN2Q9G3Wq-M

Did the problem happen all of a sudden or has the mower sat a while?

Do you have a digital mutlimeter to check the power and clutch resistance?

It is possible the carburetor is the issue...not providing enough fuel.
It is possible the governor is at fault.
It is possible the PTO clutch is bad.
It is possible there is an electrical problem.

You will have to do some testing to eliminate which parts are good and which part(s) is bad.

Eric

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.

Experience

Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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